only you can work this out... define maximum appearance. if you want maximum appearance you will have to do it by hand. there are machines but you have to choose how important the bag appeal is. i can link you to a machine which will rip the life out of your buds, sure it'll be void of most leaves..
and who the fuck would pay someone $20 an hour to use a pair of scissors?!?? especially a mexican. i would trim for you for free if i could have a joint every hour or two. have you never heard of trimming parties?
you are talking about harvesting 130+ pounds of marijuana and you are complaining about having to put some hard work in, or for having to pay a bit of monye for labour, sheeeeeeeeeeeesh.
and 150 plants at 14 ounces at 8x6foot outdoors, i want to see pictures of this